Saturday, April4, 2020
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Marine Weather and Tides
St. Augustine Beach, FL

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:08AMSunset 7:46PM Saturday April 4, 2020 7:49 PM EDT (23:49 UTC) Moonrise 3:06PMMoonset 3:59AM Illumination 90% Phase: Waxing Gibbous; Moon at 12 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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AMZ454 Expires:202004050200;;571321 Fzus52 Kjax 041919 Cwfjax Coastal Waters Forecast For Northeast Florida/southeast Georgia National Weather Service Jacksonville Fl 319 Pm Edt Sat Apr 4 2020 Atlantic Coastal Waters From Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm. Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves, Along With The Occasional Height Of The Average Highest 1/10 Of The Waves. Amz450-452-454-050200- Coastal Waters From Altamaha Sound To Fernandina Beach Fl Out 20 Nm- Coastal Waters From Fernandina Beach To St. Augustine Fl Out 20 Nm- Coastal Waters From St. Augustine To Flagler Beach Fl Out 20 Nm- 319 Pm Edt Sat Apr 4 2020
Tonight..East northeast winds 5 to 10 knots. Seas 2 to 4 feet. Dominant period 14 seconds. Inland waters a light chop.
Sunday..East winds 10 to 15 knots. Seas 4 to 6 feet with occasional seas up to 8 feet. Dominant period 13 seconds. Inland waters a light chop. A chance of showers.
Sunday night..East southeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 13 seconds. Inland waters a light chop.
Monday..Southeast winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 13 seconds. Inland waters a light chop.
Monday night..South winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 12 seconds. Inland waters a light chop.
Tuesday..South winds 5 to 10 knots. Seas 3 to 5 feet with occasional seas up to 6 feet. Dominant period 12 seconds. Inland waters a light chop. A slight chance of showers.
Tuesday night and Wednesday..West southwest winds 5 to 10 knots. Seas 2 to 4 feet. A chance of showers and a slight chance of Thunderstorms.
Wednesday night and Thursday..West southwest winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of. A slight chance of Thunderstorms in the morning.
AMZ400 Synopsis For Altamaha Sound Ga To Flagler Beach Fl Out To 60 Nm- 319 Pm Edt Sat Apr 4 2020
Synopsis.. Long period swells from the northeast driven by a low pressure system over the northwestern atlantic waters will lead to increasing seas. Offshore waters south of fernandina beach will see waves build to 4 to 6 feet tonight, peaking around 5 to 7 feet Sunday and Sunday night. A weak backdoor cold front Sunday will lead to chances for showers. On Tuesday, another weak front will move into the region, followed by yet another front around Thursday night, bringing a return for Thunderstorm chances in addition to more showers mid-week.
Gulf stream.. The approximate location of the west wall of the gulf stream as of apr 04, 2020 at 1200 utc... 65 nautical miles east of flagler beach. 74 nautical miles east of saint augustine beach. 82 nautical miles east of jacksonville beach. 93 nautical miles east southeast of st simons island. This data courtesy of the naval oceanographic office.


7 Day Forecast for Marine Location Near St. Augustine Beach, FL
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location: 29.87, -81.26     debug


Area Discussion for - Jacksonville, FL
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FXUS62 KJAX 041943 AFDJAX

Area Forecast Discussion National Weather Service Jacksonville FL 343 PM EDT Sat Apr 4 2020

NEAR TERM [Through Tonight].

Weak backdoor frontal boundary that settled southward today will drift inland through southeast GA tonight and portions of northeast FL and then stall. Flow aloft currently is west- northwest, but an upstream complex shortwave system over TX and LA will push eastward tonight, and be located right at our door step Sunday 12Z. This system will transport much more moisture than there is currently and some slight chance of rain by the morning.

SHORT TERM [Sunday Through Monday Night].

Sunday . Almost the entire day we expect cloudy skies as the shortwave with some substantial mid level vorticity pushes through the region. PWATS will be around the 1.3 to 1.5 inch range. By the late afternoon, neg vort advection should be developing as the shortwave begins to move out of the area so decreased cloudiness seems probable in the aftn. The shortwave trough may induce weak low pressure along the stalled frontal boundary over the forecast area. Expect scattered shower activity to develop given the front and shortwave activity passing through. Best chances at this time look to be over northeast FL mainly to the north of GNV. Highs not as warm as today but mid 70s to near 80 are in the forecast at this time.

Monday . Surface high pressure will return to the area with the mid and upper level ridge remaining in place aloft, rendering dry conditions once again. Highs will warm back up into the mid 80s, with low 80s along the immediate coastline.

LONG TERM [Tuesday Through Saturday].

A weak pressure pattern will remain in place aloft of the local area next week, with broad ridging over the north-central Gulf coastline and a few shortwave impulses rounding over the top of the ridge. To our north, however, the pattern is more active. On Tuesday, a low pressure system moving off the New England coastline will drag a weak cold front into SE GA, though it will stall out near the state line. Scattered showers and isolated thunderstorms are possible with this system Tuesday through Wednesday night, mostly in SE GA. On Thursday, a more potent upper level vort max will dig into the Great Lakes region, developing another cold front that will move across the southeast Thursday night-Friday.

Warming temperatures will continue early in the week with prevailing west-southwest flow. Highs will be in the 80s Tue and Wed, possibly returning to the low 90s Thu with morning lows in the 60s. Behind the cold front passage Friday, however, noticeably cooler temperatures will advect into the area with highs dropping back down to the 70s by Saturday and morning lows dipping back into the 50s.

AVIATION. [Through 18Z Sunday]

High pressure will dominate the pattern today with an east coast sea breeze moving west across the Florida Peninsula and interior southeast Georgia through 05/06 UTC. An upper level impulse will move east along the upper Gulf Coast through Sunday with gradually lowering and thickening upper and mid-level cloudiness overnight. As we move into tomorrow morning, between 05/12Z and 05/18Z, should see thickening low cloudiness between 2.5-5 kft with some light rain breaking out across the region and especially over the Florida fields. Cecil could see some light fog overnight between 3-5 SM from 05/09Z to 05/13Z.

MARINE.

Long period swells from the northeast driven by a low pressure system over the northwestern Atlantic waters will lead to increasing seas. Offshore waters south of Fernandina Beach will see waves build to 4 to 6 feet tonight, peaking around 5 to 7 feet Sunday and Sunday night. A weak backdoor cold front Sunday will lead to chances for showers. On Tuesday, another weak front will move into the region, followed by yet another front around Thursday night, bringing a return for thunderstorm chances in addition to more showers mid-week.

FIRE WEATHER.

Near critical low RH values of 25-35% will continue through the afternoon before rising in the evening hours. Conditions tomorrow are expected to be less dry with minimum RH values in the 40s and 50s as light rain moves in from out of the SE, with RH levels expected to remain above critical criteria for the rest of the week. Winds will build from out of the east on Sunday to about 5-10 mph for inland areas and up to about 10-15 mph with gusts of about 20-25 mph for areas affected by the east coast sea breeze in the afternoon.

HYDROLOGY.

The Altamaha River in SE GA remains elevated this weekend. The gauge at Baxley continues its broad crest in minor flood stage today, with the sites at Charlotteville, Doctortown, and Everett City remaining in action stage.

PRELIMINARY POINT TEMPS/POPS.

AMG 58 80 57 84 63 / 10 30 0 10 0 SSI 63 74 62 78 64 / 10 30 0 10 0 JAX 62 79 61 83 63 / 10 40 0 10 0 SGJ 63 76 62 80 63 / 10 40 20 0 0 GNV 58 80 59 85 61 / 10 30 0 10 0 OCF 58 80 59 85 61 / 10 30 0 10 0

JAX WATCHES/WARNINGS/ADVISORIES. FL . None. GA . None. AM . Small Craft Advisory from 10 AM Sunday to 8 AM EDT Monday for Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SAUF1 - St. Augustine, FL 1 mi50 min E 7 G 8 71°F 71°F1013 hPa (+0.5)
41117 13 mi80 min 71°F2 ft
GTXF1 - Guana Tolomato Matanzas Reserve, FL 15 mi65 min ESE 5.1 73°F 1014 hPa58°F
LTJF1 37 mi56 min 72°F 54°F
MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL 38 mi50 min SE 7 G 9.9 72°F 69°F1013 hPa (+0.5)
BLIF1 39 mi56 min ESE 8.9 G 11 73°F 1013.4 hPa55°F
DMSF1 39 mi50 min 71°F
NFDF1 41 mi50 min E 8.9 G 9.9 73°F

Wind History for I-295 Bridge, St Johns River, FL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Northeast Florida Regional Airport, FL8 mi54 minE 1010.00 miFair72°F59°F64%1012.9 hPa

Link to 5 minute data for KSGJ

Wind History from SGJ (wind in knots)
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Last 24hrSE6SE5SW3CalmSW3SW5SW5W4CalmSW3W5W6W6W5NW5CalmE8E9E8E9E9E10E9E10
1 day ago----CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW4E4E8E9E9E10E7E8E7SE7
2 days agoNE6NE6NE7NE7NE8NE4W3CalmW3CalmCalmCalmNW3NW7NW7NE6NE10NE10NE10E9E10E8--E8

Tide / Current Tables for St. Augustine Beach, Atlantic Ocean, Florida
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Crescent Beach, Matanzas River, Florida
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
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wmap_A
GEOS Local Image of Southeast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Jacksonville, FL (19,4,5,8)
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Ground Weather Radar Station Jacksonville, FL
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.